Einfluß der temperatur während der nachbehandlung auf risse in betonbauteilen

According to research results, flexural stress in base ground slabs caused by high temperature gradients on the first day can contribute to cracks to a greater extent than axial stress caused by soil friction. If the concrete in a structural member hardens at high temperatures in the core and at low temperatures in the periphery it will be thermally prestressed after the core has cooled down. This reduces the tendency for cracking to a considerable extent. When thermal cracking is likely to occur the concrete surface ought to be kept cool by spraying it with water or be protecting it by a reflecting curing compound at the beginning of the point of hardening.